George a



{No Model.)

G A GOODSON DIE FOR MATRIX MAKING MACHINES.

No. 414,401. Patented Nov. 5, 1889.

UNITED STATES ATENT rrrcn.

GEORGE A. GOODSON, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO THE MINNEAPOLIS ELECTRO MATRIX COMPANY, OF SAME PLACE.

DIE FOR MATRIX MAKlNG MACHINES.

SPECIFICATION forming part of Letters Patent No. 414,401, dated November 5, 1889.

Application filed May 25, 1888. Serial No. 275,034. (No model.)

To aZZ whom it nmyconoern:

Be it known that I, GEORGE A. GooDsoN, a citizen of the Dominion of Canada, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Dies for Matrix- Making Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the class of matrixmaking machines; and it consists in certain improvements in the construction of the letter of type-dies employed therein, and the said invention is disclosed in the following description and claims.

In the drawings, Figure 1 is a side elevation of one form of die embodying my invention. Fig. 2 is abottom orunderside view of the same. Fig. 3 is a partial transverse vertical section of a die on line a: 00, Fig. 2. Fig. l is a perspective view of a section of a die for another letter. Fig. 5 is a transverse sectional view of a modified construction. Fig. 6 is a bottom view of another form of die in reversed position. Fig. 7 is a section of the die shown in Fig. 6 on line y y. Fig. 8 is a like section of a modification thereof, and Fig. 9 is a section of a body of matrix material shown in isometric perspective through matrices made therein.

In the practical working of matrix-making machines much difficulty has heretofore been experienced from the fact that after the impression of a letter has been made in making the impression of another adjacent letter the die, passing down into the matrix material and displacing the necessary amount of material to form a new impression, crowds the material between the two impressions toward that previously formed, partiallyfilling and closing the same, rendering the said matrix imperfect and leaving it in such a condition that it is diificult orimpossible tosecure perfect plates therefrom. The evil of course continues throughout the line, so that all the impressions are more or less imperfect, except the last one of each line. By my improved construction of die this difiiculty is avoided. This I accomplish in the following manner:

The die is composed of a main body or shank from which extends the cha-ractenforming portion, which consists of a stem the outer face of which has the exact configuration of the letter or character. The stem, or that portion which enters and passes into the matrix material when an impression is made therein on the lefthand side, or that adjacent to the last formed character, is throughout its whole extent substantially parallel to the direction of impact or inclines from the face toward the .main body of the die to the right or away from the last-formed character. The opposite or right-hand side of this stem is inclined from the face toward the main body outwardly. This conformation is designed to elfect a downward and forward compression of the matrix material at the forward side of the impressions. In carrying out this principle of my invention of preventing later impressions from crowding and distorting earlier-made impressions I may prevent those of one line from injuriously aifecting those of a preceding line by giving to the bottom or lower side or cut of the character-forming portion of the die a like out-ward inclination, and for the purposes of this application I use the expression forward side to denote the right side or the bottom of the die, or both, being that side or sides opposite to the impressions previously formed.

In the drawings, A designates a full-length die of the form employed by me in the matrixmaking machine illustrated and described in my application, Serial No. 267,795, filed March 20, 1888. The upper part of this die is com= posed of an enlarged square guiding portion a. Below this is a cylindric portion or shank a, from the lower end of which projects the stem or impression-forming portion 1).

The die in Fig. 1 is shown as in the posi tion giving a view of the bottom or foot of the letter. From this figure and from Fig. 2

it will be seen that the stem or impression- 9 forming portion of the die has its right side inclined outwardly from the face toward the body of the die, and that the other sides of said stem are straight or vertical. This is shown in the transverse sectional view in Fig. 3, and the principle of construction is shown applied to a different letter in Fig. 4. The right side of the stem of every portion of a letter is made inclined, as just described, and all the other sides of the letter are made with straight or vertical sides. The effect of this construction is that when impressed in the matrix material a distance apart, as shown in Fig. 9, the right-hand wall of the impression for each letter is inclined, so that in casting a plate therefrom the plate is easily removed from the matrix and without injury thereto. In forming the matrices for words it will also be seen that on making the impression for the second and other succeeding letters the straight side of the die is adjacent to the impression preceding it, so that little or no crowding of the material toward the previously-formed impression takes place. It will be further seen that should there be any crowding of the material toward the previously-formed impression the result will be to force the right wall of such impression more nearly into a vertical line or position.

It is found in actual practice that the crowding is never sufficient to make the wall quite vertical or distort the previously-formed impression, and the matrix is left with the right wall of each impression more or less inclinedsufficient, at least, in casting to permit of the easy and ready separation of the metal plate from the matrix-bed.

In order to secure the least possible crowding of the matrix material back upon the previously-formed impression, I sometimes form the side of the stem or impression-forming portion of the die which is nearest the preceding impression inclined inwardly from the face toward the body of the die, or in the same direction as the opposing side, as shown at b in Fig. 5. I11 this construction the crowding action of the die is limited to the lower edge of the stem, and such crowding is therefore reduced to a minimum. The right and left sides may be inclined at the same or different angles to the axis of the die, as preferred.

, In order to prevent. the formation of a new line of impressions from interfering with the line previously formed, or to prevent any crowding of the material between the new line of impressions and the one just preceding it, I may make the stem. of each of the dies with the bottom or foot inclined the same as the right sidethat is, outwardly from the face toward the shank or main body. This construction is shown in Figs. 6 and 7, and in Fig. 8 is shown a longitudinal section of a construction in which the top of the stem is inclined in the same manner as the side b is in Fig. 5. These constructions form the subject-matter of another application filed January 31, 1889, Serial No. 298,222, and are particularly shown, described, and claimed therein.

By my improved constructions I am able to make matrix-plates free from the imperfections above referred to and toform satisfactory type-plates for printing purposes.

It will. be understood that the form of the shank or main body portion of the type is immaterial and maybe of any preferred style of construction.

Vhat I claim, and desire to secure by Letters Patent, is-

1. The herein-described character-die for matrix-making, the stem of which inclines outwardly from its face on the forward side only.

2. The herein-described character-die for matrix-making, composed of a main or guiding shank and a stem, the face of which is the form of a given character and which inclines outwardly from its face on the right or forward side only.

3. The herein-described character-die for matrix-making, having the right side inclined from the face outward toward the body of the die and the opposite side'inclining inwardly.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE A. GOODSON.

I'Vitnesses:

L. P. WHITAKER, H. J. ENNIS. 

